Electromechanical braking system

Abstract

The present invention relates to a braking technology of a vehicle, and in particular to an electromechanical brake (EMB) system with redundant power supply. The electromechanical brake system comprises a recharging power source ( 21 ) and at least two control modules ( 221, 222 ) corresponding to axles ( 241, 242 ) of a vehicle. The control modules ( 221, 222 ) comprise a power supply unit ( 251, 252 ) that supplies power to electric brake devices ( 231, 232, 233, 234 ) disposed at opposite ends of a corresponding axle ( 241, 242 ) in response to an operation demand. The power supply unit ( 251, 252 ) is charged by the recharging power source ( 21 ). The power supply unit ( 21 ) of at least one of the control modules ( 221, 222 ) is configured with redundancy.

We claim: 
     
       1. An electromechanical brake system, comprising:
 a recharging power source; and 
 at least two control modules corresponding to axles of a vehicle; 
 wherein each control module comprises a power supply unit that supplies power to electric brake devices disposed at opposite ends of a corresponding axle in response to an operation demand, and the power supply unit is charged by the recharging power source; 
 wherein the power supply unit of at least one of the control modules is configured with redundancy; 
 wherein the power supply unit with redundancy comprises at least two sub-power supply units; and 
 wherein each sub-power supply unit electrically connects the electric brake device disposed at one end of the corresponding axle and supplies power thereto. 
 
     
     
       2. The electromechanical brake system of  claim 1 , wherein each control module further comprises an energy management unit corresponding to the power supply unit, and wherein the energy management unit is configured to manage charging and discharging of the corresponding power supply unit. 
     
     
       3. The electromechanical brake system of  claim 2 , wherein the energy management unit further comprises a charge controller, electrically connected to the recharging power source and the corresponding power supply unit, and wherein the charge controller controls the recharging power source to charge the corresponding power supply unit depending on an energy level of the corresponding power supply unit. 
     
     
       4. The electromechanical brake system of  claim 2 , wherein the energy management unit further comprises a power supply switch, electrically connected to a corresponding electric brake device and the corresponding power supply unit, and wherein the power supply switch controls the corresponding power supply unit to supply power to the corresponding electric brake device in response to the operation demand. 
     
     
       5. The electromechanical brake system of  claim 1 , further comprising:
 an electromagnetically operated braking force holding device comprising at least two sets of windings and/or drive modules, wherein each of the sub-power supply units supplies power to one set of the windings and/or the drive modules. 
 
     
     
       6. The electromechanical brake system of  claim 5 , wherein the braking force holding device further comprises an electromagnetic brake and/or a solenoid. 
     
     
       7. The electromechanical brake system of  claim 1 , wherein each of the sub-power supply units electrically connects the electric brake devices disposed at both ends of the corresponding axle; and
 wherein said two sub-power supply units redundantly supply power to each electric brake device disposed at each end of the corresponding axle, or each of the sub-power supply units simultaneously supplies power to the electric brake devices disposed at both ends of the corresponding axle. 
 
     
     
       8. The electromechanical brake system of  claim 1 , further comprising:
 a brake motor comprising at least two sets of windings and/or drive modules, wherein each of the sub-power supply units supplies power to one set of the windings and/or the drive modules. 
 
     
     
       9. The electromechanical brake system of  claim 1 , wherein the power supply unit of the control module corresponding to the axle loaded with the main body weight of the vehicle is configured with redundancy. 
     
     
       10. The electromechanical brake system of  claim 1 , wherein the power supply unit comprises a capacitive power source and/or a battery. 
     
     
       11. The electromechanical brake system of  claim 1 , wherein a plurality of the control modules are electrically connected to each other, and wherein the power supply units of the plurality of the control modules are redundant with each other.